Metallic ore deposits, mineral deposits and prospects of the I, II, III, IV, and V regions, northern Chile

1992 ◽  
Author(s):  
William C. Williams
Keyword(s):  
Ore Deposits ◽  
Mineral Deposits ◽  
Northern Chile

scholarly journals Feature space of the Atasu type deposits (Сentral Kazakhstan)

2020 ◽  
pp. 5-10
Author(s):  
N. S. Askarova ◽  
A. T. Roman ◽  
V.S. Portnov ◽  
A.N. Kpobayeva
Keyword(s):  
Feature Space ◽  
Ore Deposits ◽  
Mineral Deposits ◽  
Complex Composition ◽  
Lower Carboniferous ◽  
Geological Factors ◽  
Close Time ◽  
Different Depths ◽  
Geological Formations ◽  
Visean Stage

Purpose. Studying geological formations of the Atasu type deposits to identify prospecting criteria. Methodology. Analysis of literature and fund materials, comparative analysis of geological factors characteristic of stratiform ores, stage formation and metamorphism. Findings. The main features characteristic of the deposits of the Atasu type have been formed: their belonging to the lower strata of the Upper Famennian, Upper Devonian to the Visean stage of the Lower Carboniferous; complex composition of ferromanganese and polymetallic ores formed in three hydrothermal stages (sedimentary, metasomatic and vein ones), stratiform, lenticular, localized near volcanic edifices. Originality. The main geological criteria have been established that determine the belonging of the Uspensky ore belt in Central Kazakhstan deposits to the stratiform deposits of the Atasu type formed at different depths in continental rift valleys. The criteria include the age interval of the formation of ore deposits of the stratiform type, hydrothermal staging of mineralization (sedimentary, metamorphic, metamorphic (hydrothermal, dislocation multistage and dynamothermal)); localization of folded and post-folded subvolcanic intrusions near former volcanic edifices. Practical value. The main prospecting geological criteria (features) established for the Atasu type deposits can be used to form a feature space for predicting the areas of mineral deposits localization of the Uspensky ore belt of Central Kazakhstan formed in close time periods, in similar geological-geochemical, thermodynamic and geodynamic conditions.

The ROBOMINERS project: a promising tool for the re-evaluation of “non-economical” deposits. Aiming at the development of a joined European database of potentially suitable ore deposits for the utilization of the Robominers technology.

2021 ◽  
Author(s):  
Eleni Koutsopoulou ◽  
Aikaterini Servou ◽  
George Aggelopoulos
Keyword(s):  
Spatial Distribution ◽  
National Level ◽  
Ore Deposits ◽  
Advanced Technology ◽  
Mineral Deposits ◽  
Innovative Technology ◽  
Exploration And Exploitation ◽  
Epithermal Deposits ◽  
European Database ◽  
The Creation

<p>The ROBOMINERS (Resilient Bio-inspired Modular Robotic Miner) project aims at developing new methods and technologies (prototype automation and robotics technology) to locate and exploit underground mineral deposits and is funded under the European Union’s Research and Innovation programme Horizon 2020. The project targets mineral deposits that are generally considered “non-economical” either because they are not accessible anymore for conventional mining techniques, or they have been previously explored but exploitation was considered uneconomic due to the small size of the deposits or the difficulty to access them (abandoned, small, ultra-depth deposits).</p><p> </p><p>The European Federation of Geologists (EFG) is part of the Robominers consortium and its role includes the collection of publicly available data at a national level on mineral deposits which are potential targets on the developed mining technology. The Association of Greek Geologists (AGG) is participating as an EFG Linked Third Party in the project aiming, among others, at the creation of a European database of potentially suitable ore deposits for the utilization of the Robominers technology.</p><p> </p><p>The creation of an ore deposits’ European database is a crucial procedure for the best possible design of exploration and exploitation applying the Robominers innovative approach. The AGG has contributed in the building of a database at a national level (for Greece), of the major and most important mineral deposits, according to the project requirements. A number of ore deposits in which Robominers advanced technology may provide a unique solution to mineral extraction, include porphyry and epithermal deposits and especially vein-like types, but volcanogenic massive sulphide (VMS-type) and lense-like or layered orthomagmatic deposits can also be of high importance. From the above mentioned ore deposits the most abundant in Greece are epithermal deposits, deposits in hydrothermal veins, porphyry copper, as well as chromites in ophiolite complexes. Regarding the spatial distribution vein-type or metasomatic deposits are located mostly in Northern Greece (Western Macedonia and Thrace regions) while significant variable-mineralization deposits are related with the Attico-Cycladic belt volcanism (mainly Lavrion, Evia, and islands in the Aegean Sea). Finally, PGE bearing chromite deposits and bauxite deposits, located mainly in Central Greece, may also be significant for the project.</p><p> </p><p>The establishment of a joined European Robominers database is of great significance for the progress of the project since it will provide essential information on key outputs such as the deposit type and commodities, the host rock, and the spatial distribution of the project’s targeted ore deposits and will provide valuable knowledge regarding the future planning of the exploration and exploitation from the developed Robominers innovative technology approach.</p><p>Dr Eleni Koutsopoulou</p><p>Coordinator of the project</p><p>On Behalf of the:</p><p>Association of Greek Geologists</p><p>Didotou 26,10680, Athens, Greece</p><p>VAT ID: EL-999600130</p><p> </p><p> </p>

Mineral deposits and chalcogen gases

1993 ◽  
Vol 57 (389) ◽  
pp. 599-606 ◽  
Author(s):  
Martin Hale
Keyword(s):  
Ore Deposits ◽  
Anomalous Dispersion ◽  
Mineral Deposits ◽  
Oxidation Reactions ◽  
Sulphide Minerals ◽  
Sulphide Ore ◽  
Dispersion Patterns ◽  
Sulphide Deposits ◽  
High Concentrations ◽  
And Migration

AbstractSulphide minerals and their analogues yield gases as a result of oxidation reactions. Even where sulphide minerals are in contact with mildly reducing groundwaters, S2- ions pass into solution and their dispersion patterns can be detected in soil as acid-released H2S. In more oxidising conditions, the metastable gases COS and CS2 are generated. Anomalous dispersion patterns of COS have been reported in soils above more than ten sulphide ore deposits, many of them concealed beneath transported exotic overburden. High concentrations of CS2 occur in the soils over several of the same deposits and uniquely reflect others. Anomalies of SO2 over sulphide deposits are confined to arid terrains. Certain anomalous dispersion patterns of arsenic and tellurium in soils are attributed to the generation and migration of unspecified gases from the oxidation of arsenide and telluride minerals.

Mapping Magmatic and Hydrothermal Processes from Routine Exploration Geochemical Analyses

2020 ◽  
Vol 115 (3) ◽  
pp. 489-503 ◽  
Author(s):  
Scott Halley
Keyword(s):  
Inductively Coupled Plasma ◽  
Mining Industry ◽  
Analysis Data ◽  
Ore Deposits ◽  
Mineral Deposits ◽  
Geochemical Data ◽  
High Quality ◽  
Inductively Coupled ◽  
Hydrothermal Processes ◽  
Geochemical Analyses

Abstract Analytical methods used by commercial assay laboratories have improved enormously in recent years. Inductively coupled plasma-atomic emission spectroscopy and inductively coupled plasma-mass spectrometry methods now report analyses for half of the periodic table with exceptional detection limits and precision. It is becoming commonplace for mining companies to use such methods routinely for the analysis of drill samples throughout mineral deposits. Improvements in software and computing power now allow rapid interrogation of upward of 100,000 assay samples. Geochemical analyses are quantitative, are independent of observer bias, and can form the basis for robust geologic and mineralogical models of mineral deposits, as well as shed light on scientific questions. In particular, consistently collected, high-quality geochemical analyses can significantly improve and systematize logging of lithological and hydrothermal alteration mineralogic changes within drill core. In addition, abundant, high-quality geochemical data provide insights into magmatic and hydrothermal processes that were previously difficult to recognize and that have obvious applications to mineral exploration and improved genetic models of ore deposits. This paper describes a workflow that mining industry geologists can apply to their multielement analysis data to extract more information about magma compositions and gangue mineralogy.

SOME ASPECTS OF ORE DEPOSITS IMPORTANT IN GEOPHYSICAL WORK

Geophysics ◽  
1948 ◽  
Vol 13 (4) ◽  
pp. 540-549
Author(s):  
George M. Schwartz
Keyword(s):  
Geophysical Methods ◽  
Petroleum Industry ◽  
Genetic Variations ◽  
Ore Deposits ◽  
Mineral Deposits ◽  
Detailed Knowledge ◽  
New Methods ◽  
Horizontal Extent ◽  
Definite Relation ◽  
Great Complexity

The application of geophysics to mining problems is much more difficult than is the case with the petroleum industry. The fundamental contrasts between the occurrence of petroleum and ores are outlined. Difficulties arise because of the great complexity and variation in occurrence and size of deposits of commercial metallic and non‐metallic minerals. These complexities are discussed and illustrations cited in terms of mineralogic, petrographic, structural, and genetic variations in ores. The relatively large horizontal extent of petroleum deposits, as compared with many mineral deposits is emphasized. One of the important problems in the application of geophysics to ore‐finding is determining the definite relation of ore to specific geologic features, so that the results of geophysical work can be interpreted in terms of the probable location of more ore. This is essentially a geologic problem, and one not easily solved in many districts. For the successful application of geophysics and interpretation of the results, a very detailed knowledge and understanding of the geology is fundamental. Also additional geophysical methods are required, particularly those which might locate ore directly rather than indirectly through the geology as is largely the case in petroleum. Because of the complexities involved, no one method should be considered a true test of an area but several methods should be utilized. Much more extensive and intensive application of geophysics to problems of ore‐finding, as well as new methods are demanded by the rapid depletion of present ore reserves.

K–Ar ages of clay concentrates from Irish orebodies and their bearing on the timing of mineralisation

1983 ◽  
Vol 74 (1) ◽  
pp. 1-14 ◽  
Author(s):  
A. N. Halliday ◽  
J. G. Mitchell
Keyword(s):  
Base Metal ◽  
Early Carboniferous ◽  
Hydrothermal Activity ◽  
Ore Deposits ◽  
Mineral Deposits ◽  
Powerful Method ◽  
Lower Carboniferous ◽  
Hercynian Orogeny ◽  
Vein Deposits

ABSTRACTThe K–Ar ages of 117 clay concentrates from samples associated with mineral deposits in Ireland indicate that most, if not all of the major ore deposits were formed during Carboniferous times or earlier. The Avoca orebodies are pre-400 Ma in age. Many of the vein deposits traversing Palaeozoic rocks were either formed or rejuvenated during the Hercynian orogeny c. 300 Ma ago. The SW Ireland Cu–Ba ores are 290 Ma old, and the major, frequently stratiform, base metal deposits stratabound in the Lower Carboniferous were, at least largely, formed during the Carboniferous period. In the case of the Navan orebody, an early Carboniferous age is indicated. Previous models invoking major mineralisations during Mesozoic or Tertiary times are rendered invalid. However, in some areas there appears to have been hydrothermal activity during the Triassic and possibly the Permian. The Triassic event is thought to be genetically related to coeval hydrothermal avtivity found throughout the N Atlantic regions. The data suggest that probably <10 km of cover has been removed from the majority of Ireland since Lower Carboniferous times. K–Ar dating of clays is shown to be a powerful method for constraining the ages of oredeposits.

scholarly journals Features of earthquake epicenters and mineral deposits spatial relationship in the Urals

2021 ◽  
pp. 31-36
Author(s):  
Aleksandr Guliaev ◽  
Keyword(s):  
Spatial Relationship ◽  
Ore Deposits ◽  
Tectonic Activity ◽  
Mineral Deposits ◽  
The Urals ◽  
Ural Mountain ◽  
Tectonic Structures ◽  
The West ◽  
East European ◽  
Modern Era

Introduction. Recent Ural mountain belt is an N-S Paleozoic orogen rejuvenated in the NeogeneQuaternary period. It separates the East European plate located to the west of it and the West Siberian plate located to the east of it. The Uralian orogeny presumably occurred at the Paleozoic time as a result 36 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 4. 2021 ISSN 0536-1028 of these plates interaction, which affected the geologic structure of the region. In the modern era, low tectonic activity in the bowels of the Urals continues supported by rare tangible earthquakes with a magnitude from 2.0–3.0 to 5.0–5.5, 3.0 – 3.5 on the average, and the intensity in the epicenter from 3.0–4.0 to 5.0–6.0 on MSK-64 scale. Research aim is to analyze the spatial relationship of sensible earthquakes epicenters and mineral deposits in the Urals. Research methodology included estimating the position of Ural earthquakes epicenters and mineral deposits relative to the geologic and tectonic structures of Paleozoic time, recent epoch, and the modern era. Research results. Most earthquake epicenters in the Urals are concentrated within the western part of the Uralian Orogeny to the west of the Main Uralian Fault (MUF), while most mineral deposits, especially ore deposits, are concentrated within the eastern part of the Uralian orogeny to the east of MUF. In the axial zone of MUF, earthquake epicenters are close and sometimes coincide. Consequently, the processes of ore deposits and earthquake foci formation are of a similar nature

scholarly journals Iranian regional l ament zones and the location of Cu, Pb, Zn and Fe deposits

2020 ◽  
Vol 63 (2) ◽  
pp. 8-20
Author(s):  
A. Sohrabi ◽  
S. Beygi ◽  
I. V. Talovina ◽  
A. A. Kruglova ◽  
N. S. Krikun
Keyword(s):  
Large Scale ◽  
Ore Deposits ◽  
Mineral Deposits ◽  
Geological Structures ◽  
Structural Mapping ◽  
Geological Maps ◽  
Lead Zinc ◽  
Zagros Orogenic Belt ◽  
The Relationship ◽  
Copper Lead

Background. Large-scale geological structures, such as lineaments, are of great research interest due to their potential to mark the presence of ore fields.Aim. To determine the relationship between ore deposits, lineaments and large-scale faults in Iran using satellite imagery, digital relief modelling and structural mapping.Materials and methods. In this study, we compiled a map of lineaments in the Iran, which were determined both automatically and manually. A database of the distribution of ore deposits and lineaments was compiled from available maps, publications and reports on ore deposits in Iran. These maps were overlaid to study the relationship between the locations of the lineaments, faults and ore deposits.Results. An analysis of the lineaments revealed on geological maps indicates the presence of four dominant strike directions of large and small lineaments. The developed lineament map shows the main northwest trending longitudinal faults, which are parallel to the main strike of the Zagros orogenic belt; sublatitudinal and submeridional trending oblique faults; northeast trending transverse faults. A “Combined map of lineaments and deposits of copper, lead, zinc and iron in Iran” was compiled by the ArcGis software using maps of lineaments and mineral deposits. The ore deposits identified were analysed to determine the distribution of the distances between each deposit using the counting and cumulative methods the ArcGis software.Conclusions. About 90% and 50% of ore deposits are located at a distance of less than 15 km and 5 km, respectively, from the centre line of the associated lineament. A direct relationship between the density of lineaments and the presence of deposits was observed. The obtained results demonstrate the potential of this method for assessing the prospects of ore fields in hard-to-reach and poorly studied regions.

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